I AM AFRAID THERE IS NOTHING THAT YOU PERSONALLY CAN DO.
THE A100 MOTHERBOARD IS FITTED WITH A ADDITIONAL SECURITY CHIP THAT WILL LOCK DOWN THE BIOS AND THE HARD DRIVE IF YOU DO NOT KNOW THE CORRECT PASSWORD.THE ONLY THING YOU CAN DO IS SEND THE MOTHERBOARD OFF TO HAVE A NEW CHIP INSTALLED.
HOPE THAT HELPS YOU.
IF YOU NEED THE ADDRESS OF THE COMPANY THAT DOES THE REPAIR IT IS LISTED ON THE WEBB.
MICK

Fixing BIOS incorrect power-on password promt on Toshiba Laptops
February 4, 2008 - 3:48pm
Submitted by Anonymous on February 4, 2008 - 3:48pm.
I found this info ever several blogs regarding this problem. It is a really easy fix, with just a little bit of work and patience. I have a Toshiba Satellite A105-S4014. This should also work on a A100 since they are of the same family.
1) like always with anything that you do when taking your computer apart, take out the battery and unplug it (common sense)
2) Remove the plastic cover piece above the keyboard, called the "keyboard bezel". this is the piece where you can see the speakers. This page gives several pictures as to how to do this. http://www.irisvista.com/tech/laptops/toshiba-satellite-a135/remove-main...
**I found it a little bit difficult to get the plastic retaining clips to "pop" loose, but if you are careful, you can use a small screw driver and slowly "wiggle-pry" between the two screen mounts. this is done with the screen all the way back. you could use a paper clip with a little 1/8" bend at tip to do this also. (it is a tight working area) Once these three retaining clips have come loose the others are fairly easy to "pop" Just be patient and work it slowly. once this is bezel is off the rest is super easy.**
3) Remove the keyboard. Remove the two screws that are evident once the bezel has been removed. These hold the keyboard in place. Lift the keyboard up from the screw side and the retaining clips at the front of the keyboard will lift out. (there is no need to pry here). Once the keyboard is loose you will have to either leave it connected, just off to the side, or disconnect it from the mother board. The keyboard cable connector has a black clip along the top of it. just lift this clip up a little and the keyboard cable will slide out. (the keyboard cable does not have a fixed connector, but is just a ribbon that is held in place by the black clip along the top of the keyboard cable connector) Once you have removed it you will better understand what I mean.
4) Remove the wireless card. It is the only card visible at this point. It is connected by metal spring clips. just unclip in a similar fashion as removing ram. You do not need to disconnect the wires connected to card, just move card over to expose area below card.
5) This is where the magic is... you will see C88 clearly labeled right next the jack that the wireless card plugs into. There are two little solder squares (approx 1/16") at this location. *** At this point plug the power adapter to your computer again. ***
You will have to jump the two solder squares at label C88. I used a paper clip to do this. I used pliers to bend a 1/8" long "L" and then "scuffed" up the paperclip with the teeth of the pliers. (my first try at this did not work because the paperclip had a varnish coating on it and did not adequately conduct electricity.) Once you have your paperclip set up (or the one you used to pry the bezel with) hold it in place on these two solder contact squares and press the power button to boot your computer.
6) Your computer should boot right up and bypass the bios password, which is now reset/ erased. (You might see the Windows Error startup screen that gives you different options of start up to choose. If you disconnected your keyboard, just wait for screen to time-out and it will continue on its own) Once you have booted into windows use your mouse pad to shutdown, via start-shutdown method.
7) Disconnect your power. Reinstall your wireless card and keyboard (with screws). Don't reinstall keyboard bezel at this time. Once everything (but bezel) is reinstalled, restart the computer with battery and AC adapter connected. This should boot right into your computer without any trouble. (if for some reason it does not boot up correctly and asks for the bios password again you will be glad you left the bezel off. just redo the steps again.)